Supplier Page from Thermo Fisher Scientific for Niobium foil, 0.127mm (0.005in) thick, 99.97% (metals basis excluding Ta), Ta :<0.06%
2-Fluorobenzaldehyde, 97% from Thermo Fisher Scientific
DL-Ethyl 2-bromopropionate, 99% from Thermo Fisher Scientific
Ethyl butyrate, 99% from Thermo Fisher Scientific
N-Ethylaniline, 98% from Thermo Fisher Scientific